Quick, punchy, entertaining and to the point, Alexis Ohanian, Reddit co-founder, explains how to make a splash on the net. He demonstrates how social media in general, and Reddit in particular, contributed to saving whales in Japan as well as raising awareness of their plight around the world.

Reddit is a social-voting news website with geek allegiances, a small-town feel and a penchant for lighting up the memes your friends IM you about next week.

This TED talk is a great way to start the weekend, and offers some valuable insights into how social media works its magic. Watch it: